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1// Parse a field, coercing it to the best type available.2const typeDefs = require('./type-defs.js')3const envReplace = require('./env-replace.js')4const { resolve } = require('node:path')5 6const { parse: umaskParse } = require('./umask.js')7 8const parseField = (f, key, opts, listElement = false) => {9  if (typeof f !== 'string' && !Array.isArray(f)) {10    return f11  }12 13  const { platform, types, home, env } = opts14 15  // type can be array or a single thing.  coerce to array.16  const typeList = new Set([].concat(types[key]))17  const isPath = typeList.has(typeDefs.path.type)18  const isBool = typeList.has(typeDefs.Boolean.type)19  const isString = isPath || typeList.has(typeDefs.String.type)20  const isUmask = typeList.has(typeDefs.Umask.type)21  const isNumber = typeList.has(typeDefs.Number.type)22  const isList = !listElement && typeList.has(Array)23  const isDate = typeList.has(typeDefs.Date.type)24 25  if (Array.isArray(f)) {26    return !isList ? f : f.map(field => parseField(field, key, opts, true))27  }28 29  // now we know it's a string30  f = f.trim()31 32  // list types get put in the environment separated by double-\n33  // usually a single \n would suffice, but ca/cert configs can contain34  // line breaks and multiple entries.35  if (isList) {36    return parseField(f.split('\n\n'), key, opts)37  }38 39  // --foo is like --foo=true for boolean types40  if (isBool && !isString && f === '') {41    return true42  }43 44  // string types can be the string 'true', 'false', etc.45  // otherwise, parse these values out46  if (!isString && !isPath && !isNumber) {47    switch (f) {48      case 'true': return true49      case 'false': return false50      case 'null': return null51      case 'undefined': return undefined52    }53  }54 55  f = envReplace(f, env)56 57  if (isDate) {58    return new Date(f)59  }60 61  if (isPath) {62    const homePattern = platform === 'win32' ? /^~(\/|\\)/ : /^~\//63    if (homePattern.test(f) && home) {64      f = resolve(home, f.slice(2))65    } else {66      f = resolve(f)67    }68  }69 70  if (isUmask) {71    try {72      return umaskParse(f)73    } catch (er) {74      // let it warn later when we validate75      return f76    }77  }78 79  if (isNumber && !isNaN(f)) {80    f = +f81  }82 83  return f84}85 86module.exports = parseField87